摘要:
In a highspeed and large-capacity data transfer operation effected between an extended storage unit and an input/output unit, such a data transfer system is provided, capable of preventing a performance deterioration caused by a lack of main storage capacity with employing a buffer having a large memory capacity, and deterioration of a transfer throughput caused by an overhead of an input/output operation due to a use of a buffer having a small memory capacity. There are provided a CCW for directly designating the extended storage unit as an object of a data transfer operation, and a signal line for initiating from a channel the data transfer operation between HSA-extended storage unit. Furthermore, buffers having the planes and with a small memory capacity are prepared on the HSA. The data transfer operation is carried out between the channel and the buffer with one plane, and the data transfer operation is performed between the extended storage unit and the buffer having the other plane in parallel with the first-mentioned data transfer operation. After the data transfer operations have been accomplished, a data transfer operation for the next block is executed by substituting one plane with the other plane.
摘要:
A storage controller calculates an access frequency of each logical disk; that is selects a first logical disk device of which the access frequency exceeds a first predetermined value, the first logical disk device being allocated to a first physical disk device; selects a second logical disk device which has the access frequency equal to or less than a second predetermined value, the second logical disk device being allocated to a second physical disk device; and reallocates the first and second logical device; and reallocates the first and second logical devices to the second and the first physical disk device, respectively.
摘要:
A storage controller calculates an access frequency of each logical disk; that is selects a first logical disk device of which the access frequency exceeds a first predetermined value, the first logical disk device being allocated to a first physical disk device; selects a second logical disk device which has the access frequency equal to or less than a second predetermined value, the second logical disk device being allocated to a second physical disk device; and reallocates the first and second logical device; and reallocates the first and second logical devices to the second and the first physical disk device, respectively.
摘要:
The present invention provides a storage system and a method of controlling the storage system, in which a second site rapidly resumes system process when a first site is damaged. The storage system comprises a first site including a first storage device, a second site including a second storage device, and a third site including a third storage device, and the method of controlling the storage system comprises a step of making a logical volume of the second storage device consistent with a logical volume of the first storage device by remotely copying only the differential data between the logical volume of the first storage device and the logical volume of the second storage device from a logical volume of the third storage device to the logical volume of the second storage device when the first site is damaged.
摘要:
An information addition system acquires data and a control signal from a hands-free apparatus and a navigation apparatus. The hands-free apparatus is connected to a mobile communication terminal and includes an address-book data storage unit that associates communication-partner information of the mobile communication terminal with name information and stores the associated information in a personal information database as first personal information. The information addition system includes an additional information acquiring unit that acquires date and time information at an outgoing or incoming call from the navigation apparatus as first additional information and that acquires predetermined information at the outgoing or incoming call as second additional information, and an information adding unit that identifies the first personal information in the personal information database on the basis of the communication-partner information and that associates the first and second additional information with the first personal information and stores the associated additional information.
摘要:
When plural copy groups including pairs exist, remote copying for pairs belonging to copy groups is suspended selectively on a copy group-to-copy group basis, instead of suspending remote copying in all the copy groups at once. A computer system has a host computer, plural first storage systems comprising plural first logical disks, and plural second storage systems comprising plural second logical disks. A first logical disk and a second logical disk paired with the first logical disk, and each pair belongs to either a first copy group or a second copy group. To selectively suspend remote copying on a copy group-to-copy group basis, one of the copy groups is specified first and then pairs belonging to this copy group are designated. The first storage systems comprising first logical disks of the designated pairs suspend remote copy processing for the designated pairs.
摘要:
When plural copy groups including pairs exist, remote copying for pairs belonging to copy groups is suspended selectively on a copy group-to-copy group basis, instead of suspending remote copying in all the copy groups at once. A computer system has a host computer, plural first storage systems comprising plural first logical disks, and plural second storage systems comprising plural second logical disks. A first logical disk and a second logical disk paired with the first logical disk, and each pair belongs to either a first copy group or a second copy group. To selectively suspend remote copying on a copy group-to-copy group basis, one of the copy groups is specified first and then pairs belonging to this copy group aredesignated. The first storage systems comprising first logical disks of the designated pairs suspend remote copy processing for the designated pairs.
摘要:
A storage controller calculates an access frequency of each logical disk; that is selects a first logical disk device of which the access frequency exceeds a first predetermined value, the first logical disk device being allocated to a first physical disk device; selects a second logical disk device which has the access frequency equal to or less than a second predetermined value, the second logical disk device being allocated to a second physical disk device; and reallocates the first and second logical device; and reallocates the first and second logical devices to the second and the first physical disk device, respectively.
摘要:
The present invention provides a storage system and a method of controlling the storage system, in which a second site rapidly resumes system process when a first site is damaged. The storage system comprises a first site including a first storage device, a second site including a second storage device, and a third site including a third storage device, and the method of controlling the storage system comprises a step of making a logical volume of the second storage device consistent with a logical volume of the first storage device by remotely copying only the differential data between the logical volume of the first storage device and the logical volume of the second storage device from a logical volume of the third storage device to the logical volume of the second storage device when the first site is damaged.
摘要:
When a bus is used as a data communication channel, data within a disk unit cannot be reproduced or copied into a spare disk while a control unit is making read/write processing based on a request from a host computer, or vice versa. Thus, a loop is constructed by a fiber channel capable of time division multiplex function, and the processing between the disk unit and the spare is performed not through the control unit so that the data within the disk can be copied into the spare while the processing between the host computer and the disk unit is being performed, or both processing operations can be executed in parallel.